#define _CRT_SECURE_NO_WARNINGS 1
struct TreeNode {
  int val;
  TreeNode* left;
  TreeNode* right;
  TreeNode() : val(0), left(nullptr), right(nullptr) {}
  TreeNode(int x) : val(x), left(nullptr), right(nullptr) {}
  TreeNode(int x, TreeNode* left, TreeNode* right) : val(x), left(left), right(right) {}
};

class Solution {
public:
    bool checkTree(TreeNode* root)
    {
        return root->val == root->left->val + root->right->val ? true : false;
    }
};